High crystallinity CuScO 2 delafossite films exhibiting ultraviolet photoluminescence grown by vapor-liquid-solid tri-phase epitaxy

Yuya Matsubara, Takayuki Makino, Hiroki Hiraga, Chunlin Chen, Susumu Tsukimoto, Kazunori Ueno, Yusuke Kozuka, Yuichi Ikuhara, Masashi Kawasaki

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    We have grown direct wide-bandgap CuScO 2 thin films on MgAl 2O 4(111) substrates by tri-phase epitaxy employing molten Bi-O flux on the growth surface. The full width at half maximum of (0006) rocking curve is as narrow as 0.005 degrees, an order of magnitude narrower than those grown by conventional pulsed laser deposition (PLD). Transmission electron microscopy confirms the scarcity of defect structures or precipitates, which are of high density in PLD films. The films exhibit sharp near-bandedge photoluminescence at 3.3 eV, which is absent in PLD films.

    Original languageEnglish
    Article number011201
    JournalApplied Physics Express
    Volume5
    Issue number1
    DOIs
    Publication statusPublished - 2012 Jan 1

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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    Matsubara, Y., Makino, T., Hiraga, H., Chen, C., Tsukimoto, S., Ueno, K., Kozuka, Y., Ikuhara, Y., & Kawasaki, M. (2012). High crystallinity CuScO 2 delafossite films exhibiting ultraviolet photoluminescence grown by vapor-liquid-solid tri-phase epitaxy. Applied Physics Express, 5(1), [011201]. https://doi.org/10.1143/APEX.5.011201